Page 48 - Handout Digital Electronics

Activity

1 Which of the following cases would be cases of OR or XOR, explain why?

a) A man marrying a woman or a woman marrying a man
b) A woman marrying another woman or a man marrying another man

2 Consider the proposition: If it is raining and I have no car then I will take an umbrella. Which logic
gate will you choose to implement the truth table of the above proposition?

3 Produce the truth table. Note the input variables are RAINING and NOR CAR. The output variable is
UMBRELLA.

6.9 Exclusive NOR (XNOR) logic gate

This logic gate is formed by connecting an INVERTER to the Exclusive OR gate and it produces
outputs that are complementary to those of the Exclusive OR gate for example

Standard symbol

F = A  B

Truth Table

A B F
0 0 1
0 1 0
1 0 0
1 1 1

48